SSPbrickElement

SSPbrickElement(ndof: int, material: Material, b1: float = 0.0, b2: float = 0.0, b3: float = 0.0, **kwargs)

Bases: Element

Stabilized single-point 8-node brick element for 3D continua.

This element uses physically stabilized single-point integration with an enhanced assumed strain field to reduce volumetric and shear locking. It is often more efficient than full-integration bricks on coarse meshes while improving bending-dominated response.

Tcl form

element SSPbrick <tag> <n1> ... <n8> <matTag> [<b1> <b2> <b3>]

Note

Requires a 3D nDMaterial and exactly 3 DOFs per node.
Body forces are constant in global coordinates and omitted from the Tcl command when zero.
Recorder quantities such as stress and strain follow the assigned material and are evaluated at the element center integration point.

Attributes:

Name	Type	Description
`b1`		Constant body force in the global x-direction.
`b2`		Constant body force in the global y-direction.
`b3`		Constant body force in the global z-direction.

Example

from femora.core.model import Model

model = Model()
mat = model.material.nd.elastic_isotropic(
    user_name="Rock",
    E=1.0e7,
    nu=0.25,
    rho=2500.0,
)
ele = model.element.brick.ssp(
    ndof=3,
    material=mat,
    b3=-9.81,
)
print(ele.tag)

Create an SSPbrickElement with validated material and body-force inputs.

Parameters:

Name	Type	Description	Default
`ndof`	`int`	Number of DOFs per node. Must be 3 for this element.	required
`material`	`Material`	Managed 3D `nDMaterial` assigned to the brick.	required
`b1`	`float`	Constant body force in the global x-direction.	`0.0`
`b2`	`float`	Constant body force in the global y-direction.	`0.0`
`b3`	`float`	Constant body force in the global z-direction.	`0.0`
`**kwargs`		Additional element parameters stored on the base element.	`{}`

Raises:

Type	Description
`ValueError`	If the material is incompatible, if `ndof` is not 3, or if any provided parameter is invalid.